petsc-master 2019-09-16
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TaoDefaultComputeHessianColor

Computes the Hessian using colored finite differences.

Synopsis

#include "petsctao.h"  
PetscErrorCode TaoDefaultComputeHessianColor(Tao tao,Vec V,Mat H,Mat B,void *ctx)
Collective on Tao

Input Parameters

tao - the Tao context
V - compute Hessian at this point
ctx - the PetscColoring object (must be of type MatFDColoring)

Output Parameters

H - Hessian matrix (not altered in this routine)
B - newly computed Hessian matrix to use with preconditioner (generally the same as H)

See Also

TaoSetHessianRoutine(), TaoDefaultComputeHessian(),SNESComputeJacobianDefaultColor(), TaoSetGradientRoutine()

Level

advanced

Location

src/tao/interface/fdiff.c

Examples

src/tao/unconstrained/examples/tutorials/minsurf2.c.html

Index of all Tao routines
Table of Contents for all manual pages
Index of all manual pages